On 9/4/2010 6:40 PM, Richard Evans wrote:
Drewdove wrote:

IMHO too many people laughed off complaints that the digital carriers
would
cause interference to first adjacent analogs without realizing these same
adjacent would interfere with the digital carriers rendering HD
useless in
certain (many?) situations.

As far as I'm concerned, allowing a signal to be broadcast, at a
frequency that is already allocated to something else, is always going
to be a bad idea (unless it is a system using very directional
antennas). From what I've read in this NG. HD-Radio does just that. It
ends up allowing digital signals to be transmitted on frequencies
already allocated to analogue signals. Whoever thought that would be OK,
obviously either doesn't understand radio, or simply doesn't give a sh*t
about the consequences.

Here's a book that you can read to understand how IBOC works (I mean if
you actually want to understand it).

"http://www.radioworld.com/article/8410".

On Sep 4, 9:40*pm, Richard Evans
wrote:
Drewdove wrote:
IMHO too many people laughed off complaints that the digital carriers would
cause interference to first adjacent analogs without realizing these same
adjacent would interfere with the digital carriers rendering HD useless in
certain (many?) situations.

As far as I'm concerned, allowing a signal to be broadcast, at a
frequency that is already allocated to something else, is always going
to be a bad idea (unless it is a system using very directional
antennas). From what I've read in this NG. HD-Radio does just that. It
ends up allowing digital signals to be transmitted on frequencies
already allocated to analogue signals. Whoever thought that would be OK,
obviously either doesn't understand radio, or simply doesn't give a sh*t
about the consequences.

Richard E.

Here's a site that called out the jamming affects of HD Radio, when it
was presented to Congress back in 2000:

http://web.archive.org/web/200409261...ldisaster.org/

wrote:
Volvo, that Swedish name means, I Roll.
Ball bearings, and probally also tapered bearings.In World War Two,
U.S.Army Air Force lost over four hundred and fifty American Soldiers
bombing a ball bearings factory in Schweinfurt,Germany and another
smaller ball bearings factory in Germany.Neutral Sweden took up the
slack, supplying bearings to the Nazis.
Volvo,,, Sweden,,, HUMPH!
Neutral Switzerland was working both sides of the coin, building and
repairing equipment for both, the Allies and the Axis powers.
SCREW Volvo!!! Sue the HELL out of Volvo!!!
cuhulin


You still don't get it. The fat cats sell goodies to BOTH SIDES during
wars. They win, everyone else loses. Yet you cheerlead for these
*******s because they hire a few hundred of your neighbors, (while
destabilizng the whole planet). Haley Barbour is evil. General Dynamics
and Lockheed are evil.

Drewdove wrote:
m wrote in message
...
Haven't checked much, but other automakers seem liable, too. Here's
hype from Volvo:

http://www.pdfee.com/new-2010-volvo-...echnology.html

Seems Rolls, Volvo, Audi (not yet installed), Scion, etc are liable,
too. I'll have to email these attorneys with an updated list, but they
are probably already checking. I posted links to these attorneys in
most of the automaker forums that had complaints about HD Radio!

THIS IS GREAT!!! LMFAO!!!

IMHO too many people laughed off complaints that the digital carriers would
cause interference to first adjacent analogs without realizing these same
adjacent would interfere with the digital carriers rendering HD useless in
certain (many?) situations.



KFI interferes with itself.

DigitalRadioScams wrote:

The whole IBOC system was puposely designed to jam the smaller
adjacent-cheenl stations of the dial.

So is that why it's so spectrally inefficient?
To use up more bandwidth, hence produce more jamming.

SMS wrote:


Here's a book that you can read to understand how IBOC works (I mean if
you actually want to understand it).

"http://www.radioworld.com/article/8410".

Not especially interested in the details. But I'll take a look if I can
find the time.

SMS wrote:


Here's a book that you can read to understand how IBOC works (I mean if
you actually want to understand it).

"http://www.radioworld.com/article/8410".

So I have to buy a book, and find time to read through it, to find out
about something I'm not especially interested in. Thanks for the link,
but I think I'll pass on this one.

I know how Reddifusion works.About ten years ago, that married Irish
woman (married to that Irish guy.She is from Cathair Chinn Lis,
[Caherconlish, to you] he is from Fethard. http://www.fethard.com
) wayyyyyy over yonder across the big pond explained it to me.First time
I ever heard of Reddifusion was in 1964 on my Hong Kong hotel room
radio, when I did my five days R&R in Hong Kong.
Wired Radio.
cuhulin

Richard Evans wrote:
Drewdove wrote:

IMHO too many people laughed off complaints that the digital carriers
would
cause interference to first adjacent analogs without realizing these same
adjacent would interfere with the digital carriers rendering HD
useless in
certain (many?) situations.

As far as I'm concerned, allowing a signal to be broadcast, at a
frequency that is already allocated to something else, is always going
to be a bad idea (unless it is a system using very directional
antennas). From what I've read in this NG. HD-Radio does just that. It
ends up allowing digital signals to be transmitted on frequencies
already allocated to analogue signals. Whoever thought that would be OK,
obviously either doesn't understand radio, or simply doesn't give a sh*t
about the consequences.

Richard E.


The big boys pushed IBOC because they wanted to do whatever they
could to _prevent_ the creation of a new all-digital band. They
feared that such a new band would level the playing field so the
small broadcaster would have just as good coverage as they did. That
was an intolerable and frightening idea to them.

See

http://www.kevinalfredstrom.com/2009...rom-the-start/

for more information.


With all good wishes,



Kevin, WB4AIO.
--
http://kevinalfredstrom.com/

In article ,
Richard Evans wrote:

SMS wrote:


Here's a book that you can read to understand how IBOC works (I mean if
you actually want to understand it).

"http://www.radioworld.com/article/8410".

So I have to buy a book, and find time to read through it, to find out
about something I'm not especially interested in. Thanks for the link,
but I think I'll pass on this one.

Don't worry...it isn't a "book". It is one of Radio World's usual
half-assed articles that pretends to be technical. Believe me, real
radio engineers don't learn from Radio World.

--
John Higdon
+1 408 ANdrews 6-4400
AT&T-Free At Last